Agilent AFKC-xxxx Pluggable DWDM Transceiver for operation up to 2.7 Gb/s Part of the Agilent METRAK family Data Sheet Description The MSA compliant transceivers are high performance, compact, cost effective modules for serial optical communications at data rates up to 2.7 Gb/s. They are designed to provide SONET/SDH compliant links at 2.488 Gb/s. They are also compatible with other standard data rates such as GbE. The optical power and receiver sensitivity allow for an optical power budget of 33 dB and the dispersion performance enables a range of link distances up to 160 km. The full range of C band wavelengths is available on the ITU 100 GHz grid. The benefits include the most compact multisourced package style available, hot pluggability and integrated power, wavelength and APD bias control. Device monitoring is provided via a 2-wire serial interface. System monitoring is via a loss of signal alarm. The transmitter section contains a cooled DFB laser and wavelength locker and has IEC 825 Class 1M and CDRH Class 1 eye safety. The receiver section uses an APD receiver for excellent sensitivity across the whole of C band. Connectors Optical Connector Simplex LC optical connector receptacles. Electrical Connector 70 way two-row connector. Applications * DWDM optical interfaces up to OC-48/STM-16 data rates with FEC * Optical transport platforms * Multi-service provisioning platform * Optical add/drop multiplexers * Optical switch and cross-connect * Metro core and access networks * Video Transport Systems Features * MSA Compliant (http://www.hotplugdwdm.org) * Low power dissipation <2 W typical * Controlled hot plugging * Mountable either through the front panel or directly on the host PCB * Integrated wavelength locker * Data rates from 155 Mb/s to 2.7 Gb/s (no internal data retiming) * Operation across C band on the 100 GHz ITU grid * Link optical power budget of 33 dB minimum * Dispersion performance allows links of up to 160 km * Compliant with SONET OC-48/ SDH STM-16 * Directly modulated, cooled, InGaAsP MQW DFB laser * High sensitivity APD based receiver * Automatic optical power control * Automatic wavelength control * Automatic internal APD bias generation and control * Received power monitor * AC-coupled CML compatible differential data input and output * Simplex LC optical connector receptacles * 70 way two-row electrical connector * Single +3.3 V power supply * Slow or fast TX_DISABLE Functional Description A simplified schematic diagram of the transceiver is shown in Figure 1. The transmitter subassembly contains a directly modulated DFB, a wavelength locker, thermoelectric cooler (TEC), optical power monitor and thermistor. The microcontroller compares readings from the power monitor, wavelength locker and thermistor with factory-set values and corrects for any deviations over temperature and through life. Similarly, the bias voltage on the APD receiver is controlled to optimize datasheet performance. Each transceiver can be individually addressed over the I2C bus (up to a limit of 8 per bus). The micro-controller can be interrogated and commands issued over the I2C bus (SDA and SCL lines). Alarms and Loss of Signal (LOS) are flagged by the appropriate pins (see Figure 4). Package The package outline, pin out (Figures 2, 3 and 4) and rail system (AFKA-0001, AFKA0002) are compliant with the multisource agreement (www.hotplugdwdm.org). The rail system for front panel or inboard mounting provides connection to chassis ground for EMI purposes. Tone Monitor Out Tone In Slow Tx Disable Transmitter Sub-Assembly Tx Disable Laser Driver 2 Tx Data In Module Enable Tx Alarm Micro Controller Rx Alarm 3 Add [2:0] SDA Bias SCL Tone Out Rx LOS APD Rx Post Amp 2 Rx Data Out Module Sense Figure 1. Simplified Transceiver Schematic 2 Figure 2. Mechanical Drawing Definition of datums Datum Description Module A Module Base C Centre vertical plane of module D E Back surface of module bezel, safety hard stop Top surface of customer's PCB H Leading edge of module PCB L Vertical face of module hard stop, hard stop on rail Figure 3. Detail Drawings 3 BOTTOM SIDE TOP SIDE Pin Sequence Description Pin Sequence Description 70 1 GROUND (TX) 1 2 VCC (TEC) 69 1 GROUND (TX) 2 2 VCC (TEC) 68 3 NC 3 2 VCC (TEC) 67 3 NC 4 1 GROUND (TEC) 66 1 GROUND (TX) 5 1 GROUND (TEC) 65 3 RESERVED 6 1 GROUND (TEC) 64 3 RESERVED 7 2 VCC (TX) 63 1 GROUND (TX) 8 2 VCC (TX) 62 3 RESERVED 9 1 GROUND (DIGITAL) 61 3 RESERVED 10 3 SDA 60 1 GROUND (TX) 11 3 SCL 59 3 RESERVED 12 3 MODULE ENABLE 58 3 RESERVED 13 2 VCC (DIGITAL) 57 1 GROUND (TX) 14 1 GROUND (DIGITAL) 56 3 TX DATA (-ve) 15 3 TX DISABLE 55 3 TX DATA (+ve) 16 3 TX ALARM 54 1 GROUND (TX) 17 3 TONE INPUT 53 1 GROUND (TX) 18 3 TONE OUTPUT 52 1 GROUND (RX) 19 3 RX ALARM 51 3 RESERVED 20 3 RX LOS 50 3 RESERVED 21 3 SLA-AD2 49 1 GROUND (RX) 22 3 SLA-AD1 48 3 RESERVED 23 3 SLA-AD0 47 3 RESERVED 24 3 RESERVED 46 1 GROUND (RX) 25 3 RESERVED 45 3 RESERVED 26 3 RESERVED 44 3 RESERVED 27 3 SLOW TX DISABLE 43 1 GROUND (RX) 28 3 TONE MONITOR OUTPUT 42 3 RX DATA (-ve) 29 3 MODULE SENSE 41 3 RX DATA (+ve) 30 2 VCC (RX) 40 1 GROUND (RX) 31 2 VCC (RX) 39 3 NC 32 2 VCC (RX BIAS) 38 3 NC 33 1 GROUND (RX BIAS) 37 1 GROUND (RX) 34 1 GROUND (RX BIAS) 36 1 GROUND (RX) 35 1 GROUND (RX) Top of the module PCB NOTE: NC RESERVED = = NOT CONNECTED INTERNALLY RESERVED FOR FUTURE EXPANSION (THESE ARE "NO USER CONNECT") Figure 4. Electrical Pad Layout and Pin Description 4 Underside of the module PCB as viewed through top of module Table 1. Pin Descriptions Pin No Pin Name Pin Description 1:3 V CC (TEC) Supply for TEC circuit, 3.3V5%. 4:6 Gnd (TEC) TEC ground. 7:8 V CC (Tx) Supply for analogue Tx electronics, 3.3V5%. 9 Gnd (Digital) Connection to the (Digital) ground plane. Gnd (Digital) is common with Gnd (Tx) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF. 1 10 SDA 2 wire (I2C) serial data signal. The physical layer of the interface complies with the Philips specification 9397-750-00954 'The I2C Bus Specification.' The module is designed to operate in the standard data transfer mode. 11 SCL 2 wire (I2C) serial clock signal. The physical layer of the interface complies with the Philips specification 9397-750-00954 'The I2C Bus Specification.' The module is designed to operate in the standard data transfer mode. 12 Module Enable With the module plugged in the microcontroller is powered on by default, and always accessible. Connect Module Enable to +3.3V TTL logic high to enable the remaining on board electronics, and connect to TTL logic low to disable. For detailed operation see the truth tables in the Applications Note. LVTTL interface internally pulled down to ground via 100kW. 13 V CC (Digital) Supply for digital electronics, 3.3V5% 14 Gnd (Digital) Connection to the (Digital) ground plane. Gnd (Digital) is common with Gnd (Tx) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF. 1 15 TX_Disable Connect Tx Disable to +3.3V TTL logic high to disable the transmitter optical output and connect it to TTL logic low to enable. For detailed operation see the truth tables in the Applications Note. LVTTL interface internally pulled up to Vcc via 100kW. 16 TX_Alarm Tx Alarm is flagged when an Alarm or Warning condition associated with the transmitter is encountered. In normal operation Tx Alarm is at TTL logic low, in a fault condition it is at +3.3V TTL logic high. For detailed operation see the truth tables in the Applications Note. 17 Tone Input Low frequency tone injection input. Internally ac coupled, with a 10kW input impedance. If unused this input should be connected to ground. See the Applications Note for further description. 18 Tone Output Low frequency tone recovery output. Internally ac coupled designed to drive a high impedance input, minimum 1kW. The output signal is dependent on received power and modulation depth. 19 RX_Alarm Rx Alarm is flagged when an alarm or warning condition associated with the receiver is encountered. In normal operation Rx Alarm is at TTL logic low, in a fault condition it is at +3.3V TTL logic high. For detailed operation see the truth tables in the Applications Note. 20 RX_LOS LOS is a loss of power warning. On a modulated signal the LOS warning is asserted and de-asserted at the power levels specified in this data sheet. When asserted LOS will be at +3.3 V TTL logic high, when de-asserted it will be at TTL logic low.. 21:23 SLA-AD2 SLA-AD1 SLA-AD0 Slave address bits that define the address of the module on the I2C Bus. Configured external to the module by the customer using +3.3V TTL logic levels. 24:26 Vendor Reserved Reserved for vendor specific functions. Do not connect 27 Slow TX_Disable Connect Tx Disable to +3.3V TTL logic high to disable the transmitter optical output and connect it to TTL logic low to enable. For detailed operation see the truth tables in the Applications Note. LVTTL interface internally pulled down to ground via 100kW. Slow TX_Disable can be used to switch off the laser with the power reducing from 90% to 10% of its operational value in >150 s and <1 ms. 28 Tone Monitor Output The tone monitor output provides a DC voltage proportional to the laser modulation current and an AC pkpk signal proportional to the tone current. This pin can be used to control the signal applied to the tone input and so maintain the modulation depth at the desired level. 5 Table 1. Pin Descriptions (continued) Pin No Pin Name Pin Description 29 Module Sense Internally pulled to ground via 1kW. Can be used by the customer to identify that a module has been plugged into the socket. 30:31 VCC (Rx) Supply for the receiver analogue electronics, 3.3V5% 32 VCC (Rx Bias) Supply for the APD bias generator, 3.3V5%. 33:34 Gnd (Rx Bias) Connection to the (Rx Bias) ground plane. This is an independent ground plane inside the module. 1 35:37 Gnd (Rx) Connection to the (Rx) ground plane. This is an independent ground plane inside the module. 1 38:39 NC Not connected internally. 40 Gnd (Rx) Connection to the (Rx) ground plane. This is an independent ground plane inside the module. 1 41 Rx Data (+ve) Received data output +Internally ac coupled data outputs. CML compatible. 42 Rx Data (-ve) Received data output -Internally ac coupled data outputs. CML compatible. 43 Gnd (Rx) Connection to the (Rx) ground plane. This is an independent ground plane inside the module. 1 44:45 Reserved Reserved for future functions, do not connect. 46 Gnd (Rx) Connection to the (Rx) ground plane. This is an independent ground plane inside the module. 1 47:48 Reserved Reserved for future functions, do not connect. 49 Gnd (Rx) Connection to the (Rx) ground plane. This is an independent ground plane inside the module. 1 50:51 Reserved Reserved for future functions, do not connect. 52 Gnd (Rx) Connection to the (Rx) ground plane. This is an independent ground plane inside the module. 1 53:54 Gnd (Tx) Connection to the (Tx) ground plane. Gnd (Tx) is common with Gnd (Digital) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF.1 55 Tx data (+ve) Transmit data + Internally ac coupled and terminated. CML compatible. 56 Tx data (-ve) Transmit data - Internally ac coupled and terminated. CML compatible. 57 Gnd (Tx) Connection to the (Tx) ground plane. Gnd (Tx) is common with Gnd (Digital) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF.1 58:59 Reserved Reserved for future functions, do not connect. 60 Gnd (Tx) Connection to the (Tx) ground plane. Gnd (Tx) is common with Gnd (Digital) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF.1 61:62 Reserved Reserved for future functions, do not connect. 63 Gnd (Tx) Connection to the (Tx) ground plane. Gnd (Tx) is common with Gnd (Digital) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF.1 64:65 Reserved Reserved for future functions, do not connect. 66 Gnd (Tx) Connection to the (Tx) ground plane. Gnd (Tx) is common with Gnd (Digital) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF.1 67:68 NC Not connected internally. 69:70 Gnd (Tx) Connection to the (Tx) ground plane. Gnd (Tx) is common with Gnd (Digital) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF.1 Note: Refer to relevant section of Applications note for recommended filter circuits and control and monitor functions truth table. 1. By maintaining separate signal and chassis grounds inside the module the user has maximum flexibility to couple the ground planes outside the module as appropriate to their system. If signal and chassis ground are required to be kept separate then the pins attaching the rail mechanism to the PCB should not be connected to signal ground. 6 Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause catastrophic damage to the device. Limits apply to each parameter in isolation, all other parameters having values within the recommended operating conditions. It should not be assumed that limiting values of more than one parameter can be applied to the product at the same time. Exposure to the absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Symbol Minimum Maximum Units Storage temperature TS -40 Typical +85 C Relative humidity Notes RH 0 85 % (Non-condensing) Power supply voltage VCC -0.5 3.6 V Data input voltage VI -0.5 VCC V Receiver optical input power PMAX +8 dBm 1 Maximum Units Notes +70 C 2,3 Recommended Operating Conditions Parameter Symbol Minimum Case temperature TC -5 Power supply voltage VCC 3.135 Power supply noise tolerance PSNT Typical 3.3 Slow TX + TX disable input voltage - low Slow TX + TX disable input voltage - high 3.465 V 100 mVPP 4 0.15 VCC V 5, 6 V 5, 6 V 6 V 6 Notes 0.8 VCC Module enable input voltage - low 0.15 VCC Module enable input voltage - high 0.8 VCC Transmitter Electrical Characteristics (Note 7) Parameter Symbol Maximum Units TX supply current (VCC TX) ICC TX Minimum Typical 170 mA TEC supply current (VCC TEC) ICC TEC 1200 mA Digital supply current (V CC DIGITAL) ICC DIGITAL 15 mA Power dissipation PDISS TX Data input voltage (differential) VID 1.1 400 TX ALARM output voltage - low TX ALARM output voltage - high Slow TX Disable assert time 2.7 W 9 1000 mVPP 10 0.25 V 6 V 6 10 s 11 1000 s 11 VCC - 0.5 TX disable assert time 150 8 Notes: 1. Duration of exposure to be less than 24 hours. 2. For details of recommended air flow and ambient temperature refer to Application Note. 3. See drawing for maximum case temperature point. 4. Between 10 Hz and 1 MHz and with required filter. 5. Laser is switched off when TX Disable is high. 6. For input current < 100 A. 7. Over specified case temperature range, power supply voltage range at end of life @ OC-48. 8. Maximum current during warm-up, assuming max case temperature. Maximum steady-state current is 600 mA. 9. Typical power dissipation is defined at start of life, with average component dissipation values and +25 C case temperature. Maximum power dissipation is defined as worst case end of life, with maximum dissipation for every component and +70 C case temperature. 10. Internally ac coupled and terminated (100 W). 11. Disable assert time is time taken to go from 90% to 10% of operational TX optical power. 7 Receiver Electrical Characteristics (Note 7) Parameter Symbol RX supply current (V CC RX) ICC RX APD supply current (VCC RX BIAS) ICC RX BIAS Power dissipation PDISS Minimum Typical Maximum Units 320 mA 70 mA 0.75 1.4 W Notes 9 RX DATA (CML differential) VDIFF 640 800 1000 mV 12 RX DATA (CML single ended) VSE 320 400 500 mV 12 Data output Rise and fall time (20% to 80%) LOS low Tr/Tf 150 ps 12 LOSD LOS high (asserted) LOSA VCC - 0.5 LOS assert time Logic low to high LOS deassert time Logic high to low tALOS 2.3 0.25 tDLOS V 13, 14 V 13, 14 100 us 100 us Transmitter Optical Characteristics (Note 7) Parameter Symbol Data rate Average optical output power Minimum Typical 155 Maximum Units Notes 2700 Mb/s 15 6 dBm PAVG 3 4.5 Optical extinction ratio ER 8.2 9.0 Spectral side mode suppression ratio SMSR 30 Relative intensity noise RIN Optical output eye diagram Compliant with eye mask Telcordia GR-253-CORE and ITU-T G.957 dB dB -140 Central frequency f0 196.1-0.1 i Channel spacing Df 100 Deviation from central frequency dB/Hz 16 THz 17 GHz 6 GHz 0.4 nm Spectral characteristics under modulation ( -20 dB line width) Dl20 Jitter generation pk to pk 70 mUI RMS 7 mUI DP 2 dB 18 Back reflection sensitivity -24 dB 19 Optical output power in 'off' state -40 dBm 20 Dispersion penalty 0.2 Notes: 12. Data outputs are internally ac coupled and require external termination at the inputs of the receiving equipment via a 100 W differential load. 13. LOS is LVTTL compatible. For multirate applications LOS may be detected for long "all-zeros" patterns. 14. For output current <2.5 mA, 15. Information on operation at 9 data rates below 155 Mb/s available on request. 16. Measured in the frequency range 100 MHz to 3 GHz. 17. ITU grid, i from 0 to 4. 18. Measured with 223-1 PRBS, 10-10 BER at 2.48832 Gb/s for link distances up to 100 km (AFKC-xxxxD) and 160 km (AFKC-xxxxE), over standard single mode fiber with maximum dispersion as defined in ITU-T G.957, Fig A.2 for G.652 fiber. 19. With no degradation of BER. 20. With TX disable asserted and/or module enable de-asserted. 8 Receiver Optical Characteristics (Note 7) Parameter Symbol Minimum Data rate Maximum Units Notes 155 Typical 2700 Mb/s 21 -30 -6 dBm 22 -33 dBm Optical input power PR LOS Deassert PD LOS Assert PA -45 LOS Hysteresis PD - PA 0.5 4 Receiver optical reflectance ROR -27 dB 1500 1580 nm 23 Wavelength range Tone Parameter Symbol Minimum dBm Typical dB Maximum Units Notes Input Voltage 0 2.0 VPP 24 Output Voltage 0 2.5 VPP 25 Modulation Frequency 50 500 kHz 26 Monitor Output 0 2.0 V 27 0.5 dB 28 Tone Penalty Serial Interface The physical layer of the interface complies with the Philips I2C Bus Specification. Addressing, command structure, static data, diagnostic monitoring, alarms and warnings are all MSA compliant. Electrical Characteristics Parameter Symbol Minimum Maximum Units Notes I2C interface VIL 0 Typical 0.3 VCC V 29 (SCL and SDA) VIH 0.7 VCC VCC V 29 I2C interface (SDA output) VOL 0 0.5 V 29 VOH VCC - 0.5 VCC V 29 Monitor Functions available over the Serial Interface Parameter Monitor Warning Alarm Alarm Action Laser temperature Yes Module temperature Yes If low/high If low/high Shut down Tx and Rx Laser bias current Yes If high Laser modulation current Yes If low/high Shut down Tx only If high Shut down Rx only TEC current Tx optical power If high Yes Rx optical power Yes APD bias voltage (Note 30) Yes LOS If high Yes Wavelength If outside normal operating limits If >50 GHz from ITU frequency Shut down Tx only Start-up time-out Note 31 If start time high Shut down Tx only 9 Notes: 21. Operation at 2.7 Gb/s and at data rates below 155 Mb/s at reduced sensitivity. Information available on request. 22. At 2.48832 Gb/s and 10 -10 error rate with a PRBS 223-1 input, with a TX source ER of 8.2 dB. 23. Results up to 1610 nm available on request. 24. 1 volt pk-pk input produces approximately 12% mod depth. Mod depth is defined at the optical output as 100*(pk-pk tone /average output power). 25. Tone output voltage. Output swing is dependent on level of optical input. Under fixed optical input conditions the output variation due to mod depth is linear. 26. Modulation frequency. -3 dB bandwidth. 27. The monitor output gives a DC voltage proportional to the modulation current and an AC pk-pk signal proportional to the tone current. Eg if DC level is 1 volt and AC signal is 120 mV then the tone is 12% of the modulation current. This pin is used by the customer to control the signal applied to the tone input and thereby adjust the mod depth to the desired level. 28. For modulation depth of 6% or less, at 2.48832 Gb/s and 10-10 error rate with a PRBS 223-1 input.. 29. 2-wire serial interfaces each require an external 4.7 k to 10 k pull up resistor to VCC. 30. Accurate to within 1.5 dB. 31. TX ALARM signal is high throughout the module's start up sequence. 10 Ordering Information DWDM Transceiver AFKC-x x x x x Code Link Distance (km) D 100 E 160 Code Frequency (THz) Wavelength (nm) Code Frequency (THz) Wavelength (nm) 9610 196.10 1,528.77 9360 193.60 1,548.51 9600 196.00 1,529.55 9350 193.50 1,549.32 9590 195.90 1,530.33 9340 193.40 1,550.12 9580 195.80 1,531.12 9330 193.30 1,550.92 9570 195.70 1,531.90 9320 193.20 1,551.72 9560 195.60 1,532.68 9310 193.10 1,552.52 9550 195.50 1,533.47 9300 193.00 1,553.33 9540 195.40 1,534.25 9290 192.90 1,554.13 9530 195.30 1,535.04 9280 192.80 1,554.94 9520 195.20 1,535.82 9270 192.70 1,555.75 9510 195.10 1,536.61 9260 192.60 1,556.55 9500 195.00 1,537.40 9250 192.50 1,557.36 9490 194.90 1,538.19 9240 192.40 1,558.17 9480 194.80 1,538.98 9230 192.30 1,558.98 9470 194.70 1,539.77 9220 192.20 1,559.79 9460 194.60 1,540.56 9210 192.10 1,560.61 9450 194.50 1,541.35 9200 192.00 1,561.42 9440 194.40 1,542.14 9190 191.90 1,562.23 9430 194.30 1,542.94 9180 191.80 1,563.05 9420 194.20 1,543.73 9170 191.70 1,563.86 9410 194.10 1,544.53 9160 191.60 1,564.68 9400 194.00 1,545.32 9150 191.50 1,565.50 9390 193.90 1,546.12 9140 191.40 1,566.31 9380 193.80 1,546.92 9130 191.30 1,567.13 9370 193.70 1,547.72 9120 191.20 1,567.95 11 Related Products AFKC-1000D AFKC-1000E 2.7Gb/s DWDM Transceiver, 100 km reach, unspecified wavelength 2.7Gb/s DWDM Transceiver, 160 km reach, unspecified wavelength AFKT-xxxxD AFKT-xxxxE 2.7Gb/s DWDM Transmitter, 100 km reach, same package as AFKC-xxxx 2.7Gb/s DWDM Transmitter, 160 km reach, same package as AFKC-xxxx AFKR-1000D 2.7Gb/s Receiver, same package as AFKC-xxxx AFKC-0001D AFKC-0001E Evaluation kit for the AFKC-xxxxD Evaluation kit for the AFKC-xxxxE AFKA-0001 AFKA-0002 AFKA-0003 Rail mechanism for AFKC series. EMI kennel for AFKC series, should be ordered with AFKA-0001. Evaluation Board for AFKC-xxxxD and AFKC-xxxxE. www.agilent.com/ semiconductors For product information and a complete list of distributors, please go to our web site. For technical assistance call: Americas/Canada: +1 (800) 235-0312 or (408) 654-8675 Europe: +49 (0) 6441 92460 China: 10800 650 0017 Hong Kong: (+65) 6756 2394 India, Australia, New Zealand: (+65) 6755 1939 Japan: (+81 3) 3335-8152(Domestic/International), or 0120-61-1280(Domestic Only) Korea: (+65) 6755 1989 Singapore, Malaysia, Vietnam, Thailand, Philippines, Indonesia: (+65) 6755 2044 Taiwan: (+65) 6755 1843 Data subject to change. Copyright (c) 2003 Agilent Technologies, Inc. May 8, 2003 5988-9525EN